Specific techniques for flower and fruit thinning of pears

1. Most of the cells of flowering, fruit setting and young fruit during sulfur blossom and fruit thinning period are mainly determined by storage nutrition, sparse the excess flowers and fruits as far as possible, reduce the consumption of large stomach, and concentrate all the nutrients on the flowers and fruits that should be left in order to grow into big fruit. Therefore, from this point of view, early vulcanization boat thinning is better, bud thinning is better than flower thinning, flower thinning is better than fruit thinning. However, it depends on the number of flowers, flowering weather, tree strength, fruit setting, and so on, before deciding whether to thinning buds, flowers, fruit, or a combination of the three. Pear orchards with large amount of flowers (big year), good weather and heavy workload can be started in advance, thinning flowers, and finally determining the fruit. On the contrary, only one-time fixed fruit can be made. The fruit thinning work should be completed within 4 weeks after falling flowers.

2. Because the degree of tree thinning is determined by branches, if the average load per tree in the whole garden is determined, when thinning each tree (branch), it will vary according to the tree (branch). The strong will stay more and the weak will stay less. For big trees full of flowers and fruits (50% or more than 60% of flowers), you should lighten more vegetables and start early. Weak branches with weak order, but the whole branch can be thinned out, leaving empty platform (blooming in the same year and fruiting in the next year), leaving only strong branches and single fruit, no or less double fruit. For large and medium fruit varieties, leave 1 fruit per 15h20 centimeter. A small number of trees with a flower amount of about 25% should be sparse and stay more, leave the table empty, or borrow branches (preface) to leave fruit on the strong order of the branches; the strong branches of the strong trees should leave more branches and fruits to press the fruit. Weak trees (branches) do not leave fewer shoots and first fruits. There are more strong fruiting branches on the back, more in the big fruiting branches, less in the weak fruiting branches below the back, and moderate in both sides. In the branch group that will be updated, stay close and form a flower nearby to bear fruit next year; prepare for the branch group to retract.

3. If there are many and strong auxiliary shoots, it shows that they can grow into big fruits, and when the whole tree flowers are insufficient, double fruits can be left; the golden mean secondary shoots and Zhuangtai leave a single fruit; if there is no auxiliary shoots and weak shoots, they can not be left if they are not enough.

4. According to the position of flower and fruit, the pear is kept in an inflorescence, the pear blossoms first and inward in turn, and the first one is generally large young fruit, easy to grow into large fruit, and the fruit is in the right shape. So you should keep the lace fruit and remove the rest of the fruit.

5. According to the growth of the young fruit, it is determined that the stalk is long and thick, the young fruit is long, the equal end is closed and prominent, and it is easy to develop into a large fruit, which should be retained; remove those fruits that are round in shape and do not protrude when the calyx opens.

6. The principle of fruit thinning is that the disease, pest fruit, crooked fruit, small fruit, leaf grinding fruit and fruit fruit should be removed first from the inferior fruit. If the amount is still excessive, the superior fruit should be further retained and the inferior fruit should be removed to adjust the distribution of the whole tree. When thinning Ryukyu fruit, it is best to use fruit scissors and pay attention to the top of the fruit table of the flower bushes. In an inexperienced pear orchard, fruit thinning can be carried out in two stages, first the fruit, then the fruit. For inexperienced fruit thinners, spot check the amount of fruit left at any time and correct it in a timely manner. You can also leave every 10 fruits on the tree and put one fruit in your pocket. After thinning the whole tree, count the fruit and calculate the actual number of fruits left on the tree so that you have a good idea.